List of all Windows NT operating system releases, listed alphabetically. This Operating Systems by Windows NT list includes all Windows NT based OS system releases. This Windows NT OS list contains all new and old releases of the Windows NT operating system. Some of these might are top rated versions of Windows NT, while others may be horribly outdated.
Everything from Windows NT 3.1 to Windows NT 4.0 is included on this list.
This list answers the questions, "How many versions of Windows NT are there?"